help for the configuration of your computer: browser and Java
    (to display the Java applets)

 java

•   This page is obsolete since CheerpJ (used on this site) again allows you to view Java applets with all browsers, without a Java environment.
•   On sites not using CheerpJ it is however possible to display the Java applets with Chrome and its CheerpJ add-on.
    Warning ! you cannot use the Chrome extension on a page already using CheerpJ in its HTML code: (de)activate with the icon in the menu bar.


WARNING!  The most used browsers, Chrome, Edge, Firefox (versions after 51), Opera ... Safari (Mac OS, versions after 11) ... are no longer Java-compatible (same for some servers), so they no longer run Java applets.
On Android (tablets and smartphones) there is no Java-compatible browser.

choice of a Java-compatible browser for PC

Internet Explorer (Win 10 accessory) - see Internet Options thereafter,
  and two forks of Firefox - Pale Moon and Waterfox are Java-compatible.
Note regarding your version of IE: if "About IE" (help tab / ?) does not mention "64 bit" then you have a 32 bit version.

installation and configuration of Java on PC

As with all Java applets, LiveGraphics3D requires a Java plug-in activated in your browser.

Download  jre-8u241-windows-x64.exe  from one of the pages https://www.java.com/en/download/ or https://java.com/en/download/manual.jsp,
  save it, then install Java (double click).
It's the latest 64-bit version for Windows in early 2020; a newer version may be available when you read these lines.
If you are using a 32-bit browser, install the 32-bit version of Java; the two versions, 32 and 64 bits, coexist without problem.
  Note: IE 32 bits offers to install 32 bit Java.

Launch the Java control panel (All control panels -> Java); now let's look at the different tabs:
    • General: nothing to configure
    • Update: choose your options
    • Java: check that the installed version is activated; parameters are reserved for specialists
    • Security: important settings
        - make sure "Activate Java content ..." is checked
        - security level: high (not "very high")
        - list of authorized sites: add  http://maths.ac-noumea.nc  (neither https nor www.) to the list
        - manage certificates: a matter for specialists
    • Advanced: very technical, only a few options deserve your attention:
        - hide the console
        - check Mozilla family if you have chosen to use Pale Moon or Waterfox
        - JNLP File/MIME Associations : always allow
        - you can display the Java icon in the status bar (last option)

Restart your browser to activate Java.
Test on the home page of the site: you should see a gray dodecahedron in the vertical blue strip,
  after authorizing the execution of the applet (security prompt).

Internet Explorer and Internet Options (Security tab)
Check (customize the level) that the security level does not exceed medium-high
and that you have authorized scripts (for JavaScript menus), pop-up windows, and obviously the scripts of Java applets.

if you have a Mac

Note: This paragraph is a summary of Oracle's instructions, not yet personally tested.
You can only install Java on an Intel-based Mac running Mac OS X 10.7.3 (Lion) or later and for a 64-bit browser;
  you must have administrator privileges.

Safari (versions after 11) is no longer Java-compatible: the choice of browser is therefore limited:
        - Waterfox : file Waterfox Current 2020.02 Setup.dmg  is Java-compatible (tested)
        - Pale Moon : file palemoon-28.8.0.mac64.dmg  (this version seems not Java-compatible)

Java installation and configuration
  • Download   jre-8u241-macosx-x64.dmg   from the page https://java.com/en/download/manual.jsp, then install Java.
    jre-8u241 is the latest version for Mac in early 2020; a newer version may be available when you read these lines.
  • To find the Java control panel, click the Apple icon and from From System Preferences click the Java icon.
  • Configure Java as for a PC (see above).
  • Restart your browser to activate Java.
  • Test on the home page of the site: you should see a gray dodecahedron in the vertical blue strip,
     after authorizing the execution of the applet (security prompt).


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français 		You can view Java applets with Chrome and its CheerpJ extension. January 2020
updated 18-05-2021